We know the brain keeps growing until about age 25, per The University of Rochester, and that’s the age most people become more fully adult. Neuroplasticity, or the brain’s capacity to adapt and change based on our environment and experiences means we keep learning; our capacity is not fixed once the brain physically matures. That should give you hope if you’re in love with someone who’s emotionally immature. They might evolve.
But here’s how immaturity could show up in your relationship — if your partner can’t seem to take responsibility or allow themselves to be held accountable, pay attention. So if the car has faulty breaks and they didn’t take it to the mechanic as promised, they might blame a circumstance or someone else. You may find them resistant to committing to any future-related plans because it makes them feel restricted or inhibited. They won’t admit to making a mistake. They may resort to deflating your attempts at a serious conversation with jokes, pranks, or even bullying. They could be impulsive and not too interested in dealing with the consequences of thoughtless remarks.
Often, emotionally immature people refuse to partake in conversations or situations with any depth, choosing to keep life superficial. The takeaway: over time, after the fun and excitement are no longer sustainable on their own, you may feel a sense of emptiness from a profound lack of intimacy.